René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Support for Scalar Image Cursor Display?","articleBody":"How would everyone feel about the following change?  It will show the `z` value of a scalar image in the cursor if available (similar to what Matlab does).  If there is no image or the image is RGB, it will revert to the previous behaviour.\n\n``` diff\n--- a/lib/matplotlib/axes/_base.py\n+++ b/lib/matplotlib/axes/_base.py\n@@ -2971,7 +2971,12 @@ class _AxesBase(martist.Artist):\n             ys = '???'\n         else:\n             ys = self.format_ydata(y)\n-        return 'x=%s y=%s' % (xs, ys)\n+        try:\n+            z = self.images[0].get_array()[int(y + 0.5), int(x + 0.5)]\n+            zs = self.format_xdata(z)\n+            return 'x=%s y=%s z=%s' % (xs, ys, zs)\n+        except:\n+            return 'x=%s y=%s' % (xs, ys)\n\n     def minorticks_on(self):\n         'Add autoscaling minor ticks to the axes.'\n```\n","author":{"url":"https://github.com/blink1073","@type":"Person","name":"blink1073"},"datePublished":"2015-01-09T02:27:34.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":27},"url":"https://github.com/3984/matplotlib/issues/3984"}